1. Purchase through website channels: Sellers can purchase return mailing labels on the eBay official website.

On the website, sellers can choose a shipping company and pay with a bank card or credit card.

2. Purchase through overseas warehouses: If the seller cannot purchase a return label through the website, they can contact the overseas warehouse in their area, which usually provides eBay return label services.

The seller can negotiate with the overseas warehouse about the purchase of return labels.

3. Purchase through a forwarding company: If the above two methods are not feasible, the seller can wait for the buyer to return the goods to the forwarding company, and then purchase a return label from the forwarding company.

This will be relatively more affordable.